He was shot to death by the husband of the woman he was visiting

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This undated image provided by the Whitefish, Mont., Police Department shows TV personality, Gregory Rodriguez who was shot and killed by Wayne Bengston, while Rodriguez was visiting Bengston's wife. Bengston later committed suicide.

A tragic end for the host of A Rifleman's Journal.

Gregory G. Rodriguez, whose show aired on the Sportsman Channel, was shot to death late last night at a Whitefish, Mont., residence by the husband of the woman he was visiting, E! News confirmed Friday.

The shooter, Wayne Bengston, then roughed up his wife, drove her and their 2-year-old son to a relative's house, went back to his home and killed himself, according to Flathead County Sheriff Chuck Curry. He told reporters it was an "open-and-shut case. Homicide and suicide."

Per authorities, Rodriguez was visiting Bengston's wife at her mother's house when her husband showed up at about 10:30 p.m. Curry said that the emergency call came in at 11 p.m. and that Rodriguez was shot multiple times.

Rodriguez, 43, was married with two children, according to the Billings Gazette. He was also reportedly the founder and CEO of Global Adventure Outfitters, an editor at Shooting Times Magazine and a contributing editor at Petersen's Hunting: Guns &Ammo and Dangerous Game Hunting.

A Rifleman's Journal followed the marksmanship instructor and outdoor writer on big-game hunting trips around the world, focusing on "the challenge and adventure of the hunt," per the Sportsman Channel synopsis.

"The victim was here on business and had stopped to talk to a friend for the evening and have a glass of wine," Whitefish Police Chief Bill Dial told the Gazette. "Mr. Bengston came into the home and shot him immediately. We think that it was just a professional relationship, but perhaps the husband thought it was more than that. But that is just conjecture."